Combined lightning arrester and choke coil



K. B. NAR/INS AND G. R. GAMPHER.. COMBINED LIGHTNING ARRESTER AND CHOKE COIL.

` APPLICATION FILED FEB.18.' IBZI. 1,430,674. Patented 0015.3, 1922.

2 SHEETS-SHEET I.

Ilvru.

K.B. NARANS AND G. R. GAIVIPHER. COMBINED LIGHTNING ARRESTER AND CHOKE COIL.

APPLxcAloN FILED 158.1811921.

Pmmed 001. 3,1922.

. 2 SHEETS-SHEET 2.

Patented oci. 3, 1922.

UNITED STATES PATENT OFFICE.

kann n. NABANS AND' GEORGE n. GAMPHER, or nnnonano, ILLINOIS.

COMBINED LIGHTNING ARRESTER A N D CHOXE COIL.

Application filed4 February 18, 1921. SerialV No. 445,960.

To all whom it may concern:

'Be it known that we, KAnnB. NAmNs and GEORGE R. GAMPHER citizens of the United States, residin at ldorado,`in the county of Saline and tate of Illinois, have. invent# ed certain new and useful Improvements in a Combinedv Lightning Arrester and Chokev Coil; andwe do hereby .declare the following to be a full, clear, and exact description of the invention, such as l'will 'enable others skilled in the art to which it appertains to make and use the same.

In recognition of the fact that, in the use of distributing transformers as at present employed and instal1ed,the breaking down, puncturing or burning out of the coils, due to an overload, such as .lightning or other static discharge, occurs in the first ten or twelve convolutions of the coil, it is an obj ect of the invention to arrange a protective or choke coil in such relation to and outside of the transformer as to absorb the energy of the overload or excessive charge and prevent' it from reaching the coil ofthe transformer,

and more especially to combine or associate such a protective or choke coil with a lights ning arrester in a common or unitary apparatus or appliance for arrangement between the line and the transformer, so that the ositioning of the lightning arrester `will be accompanied by the proper location in reference thereto and with reference to the transformer of the choke coil, and so that the cost of constructing and installing the choke coil ,may be minimized, and materially reduced from that which is involved in the independent construction and mountin or installing thereof, and in carrying out this object the choke coil feature, of which a typical form is illustrated in the accompanying drawing, is associated with a lightning arrester of a commercial form well known upon the market as the vGeneral Electric compression chamber type, and is so related with the arrester as to adapt it to be constructed therewith as a unitarydevice designedto be installed in one operation under conditions precluding the possibility of an improper or ineective relative arrangement. i y

In the drawings: AFigure l is a side view of an apparatus embodying the invention..

Figure 2 vis a vertical sectional view .of e the Same.

in a cement compound as indicated at 14 and 15 with ya metallic cap 16 closing the upper ends of the t'ubes and housed within the insulating cap.

In the tube l0 is arranged the resistance rod 17 of the type of lightningy arrester above mentioned, together with the metallic electrodes 18 spaced by insulating rings 19V to form spark gaps with the conductor 2O the ground lead 21, whilel attached to the met'al cap 16 is a terminal 22 for the connection of the line lead 23.

` The choke coil 24 having any desired number of convolutions is connected at its upper end to the metallic cap so as to be in connection therethrough with theterminal 22 andis provided at its lower end with the terminal 25 with which is connected the transformer lead 26.

vice of unitary construction `a combined lightning arrester and choke coil", adapted to be installed or secured in operative position by a single operation with the elements thereof properly located' with reference to the transformer and with thechoke coilA between the arrester and the transformer with the arrester on the line side of the coil, and with the coil presenting a suilicient number of convolutions outside of or in the path of approach to the transformer to absorb anyoverload to prevent the burning vout'or puncturing of the transformerJOO coil, while said choke coil acts to choke back lightning and cause it to pass through the arrester to the ground.

Obviously the gage of the wire forming the choke coil may be varied to suit vthe load 105 under which the apparatus is to be placed while the combination with the choke coil of the arrester eleminates the hazard incident to the use of the ordinary choke coils now in use by reason of the fact that it is 110 Thus there is arranged in a common dey 75 at the lower end of the series connected with coil provided with the same line terminal,

the lightning arresting means having a terminal adapted to be connected to groundI and the coil having a terminal adapted to be connected to a transformer terminal.

2. A device for the purpose specied having parallel tubes of insulation, a base and a closure cap common to said tubes, a terminal cap common to said tubes adapted to be connected to the line, lightning arresting means including a resistance rod and spark electrodes arranged in one of the tubes and Ia choke coil arranged in the other tube and in connection at one end with said terminal cap, the lightning arresting means having4 a separate terminal adapted to be connected to 'the ground and the choke coil having a separate terminal adapted to be connected to a transformer lead.

In'testimony whereof We aix our signatures in presence of two witnesses.

'KARL B. NARANS.

GEORGE R. GAMPHER.

Witnesses:

C. S; MALONE,

EDWARD MATHIEU. 

